arch/m68k/include/asm/mac_oss.h

   1 /*
   2  *      OSS
   3  *
   4  *      This is used in place of VIA2 on the IIfx.
   5  */
   6
   7 #define OSS_BASE        (0x50f1a000)
   8
   9 /*
  10  * Interrupt level offsets for mac_oss->irq_level
  11  */
  12
  13 #define OSS_NUBUS0      0
  14 #define OSS_NUBUS1      1
  15 #define OSS_NUBUS2      2
  16 #define OSS_NUBUS3      3
  17 #define OSS_NUBUS4      4
  18 #define OSS_NUBUS5      5
  19 #define OSS_IOPISM      6
  20 #define OSS_IOPSCC      7
  21 #define OSS_SOUND       8
  22 #define OSS_SCSI        9
  23 #define OSS_60HZ        10
  24 #define OSS_VIA1        11
  25 #define OSS_UNUSED1     12
  26 #define OSS_UNUSED2     13
  27 #define OSS_PARITY      14
  28 #define OSS_UNUSED3     15
  29
  30 #define OSS_NUM_SOURCES 16
  31
  32 /*
  33  * Pending interrupt bits in mac_oss->irq_pending
  34  */
  35
  36 #define OSS_IP_NUBUS0   0x0001
  37 #define OSS_IP_NUBUS1   0x0002
  38 #define OSS_IP_NUBUS2   0x0004
  39 #define OSS_IP_NUBUS3   0x0008
  40 #define OSS_IP_NUBUS4   0x0010
  41 #define OSS_IP_NUBUS5   0x0020
  42 #define OSS_IP_IOPISM   0x0040
  43 #define OSS_IP_IOPSCC   0x0080
  44 #define OSS_IP_SOUND    0x0100
  45 #define OSS_IP_SCSI     0x0200
  46 #define OSS_IP_60HZ     0x0400
  47 #define OSS_IP_VIA1     0x0800
  48 #define OSS_IP_UNUSED1  0x1000
  49 #define OSS_IP_UNUSED2  0x2000
  50 #define OSS_IP_PARITY   0x4000
  51 #define OSS_IP_UNUSED3  0x8000
  52
  53 #define OSS_IP_NUBUS (OSS_IP_NUBUS0|OSS_IP_NUBUS1|OSS_IP_NUBUS2|OSS_IP_NUBUS3|OSS_IP_NUBUS4|OSS_IP_NUBUS5)
  54
  55 /*
  56  * Rom Control Register
  57  */
  58
  59 #define OSS_POWEROFF    0x80
  60
  61 /*
  62  * OSS Interrupt levels for various sub-systems
  63  *
  64  * This mapping is layed out with two things in mind: first, we try to keep
  65  * things on their own levels to avoid having to do double-dispatches. Second,
  66  * the levels match as closely as possible the alternate IRQ mapping mode (aka
  67  * "A/UX mode") available on some VIA machines.
  68  */
  69
  70 #define OSS_IRQLEV_DISABLED     0
  71 #define OSS_IRQLEV_IOPISM       1       /* ADB? */
  72 #define OSS_IRQLEV_SCSI         IRQ_AUTO_2
  73 #define OSS_IRQLEV_NUBUS        IRQ_AUTO_3      /* keep this on its own level */
  74 #define OSS_IRQLEV_IOPSCC       IRQ_AUTO_4      /* matches VIA alternate mapping */
  75 #define OSS_IRQLEV_SOUND        IRQ_AUTO_5      /* matches VIA alternate mapping */
  76 #define OSS_IRQLEV_60HZ         6       /* matches VIA alternate mapping */
  77 #define OSS_IRQLEV_VIA1         IRQ_AUTO_6      /* matches VIA alternate mapping */
  78 #define OSS_IRQLEV_PARITY       7       /* matches VIA alternate mapping */
  79
  80 #ifndef __ASSEMBLY__
  81
  82 struct mac_oss {
  83     __u8  irq_level[0x10];      /* [0x000-0x00f] Interrupt levels */
  84     __u8  padding0[0x1F2];      /* [0x010-0x201] IO space filler */
  85     __u16 irq_pending;          /* [0x202-0x203] pending interrupts bits */
  86     __u8  rom_ctrl;             /* [0x204-0x204] ROM cntl reg (for poweroff) */
  87     __u8  padding1[0x2];        /* [0x205-0x206] currently unused by A/UX */
  88     __u8  ack_60hz;             /* [0x207-0x207] 60 Hz ack. */
  89 };
  90
  91 extern volatile struct mac_oss *oss;
  92 extern int oss_present;
  93
  94 #endif /* __ASSEMBLY__ */